Bug970187, CDMA-3way calls

https://bugzilla.mozilla.org/show_bug.cgi?id=970187
I agree with modified function name.
But I cannot agree with "TelephonyHelper.isCdmaNetwork(connection)".
Because calls_handler.js is not in the same place as telephony_helper.js and mmi.js.
So I think "TelephonyHelper.isCdmaNetwork(connection)" cannot be called from calls_handler.js.